How to match music when shooting with dv camera?

In the later stage, you can only pull the audio track, and in the early stage, you can't record the actual sound on the spot, or you have very high requirements for equipment and need a noise-reducing microphone with strong directivity, that is, the kind that hangs on a pole and is furry. In addition, professional recording pens are needed, such as Sony PCM-D 100, which are often used for live recording.